<template>
    <div class="goodsinfo-container">

        <transition
          @before-enter="beforeEnter"
          @enter="enter"
          @after-enter="afterEnter">
            <div class="ball" v-show="ballFlag" ref="ball"></div>
        </transition>

        <!-- 商品轮播图区域 -->
        <div class="mui-card">
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <swiper :lunbotuList="lunbotu" :isfull="true"></swiper>
                </div>
            </div>
        </div>

        <!-- 商品购买区域 -->
        <div class="mui-card">
            <div class="mui-card-header">{{goodsinfo.title}}</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p class="price">
                        市场价:<del>￥{{goodsinfo.market_price}}</del>   销售价 <span class="now_price">￥{{goodsinfo.sell_price}}</span>
                    </p>
                    <p>购买数量:<numbox  @getcount = "getSelectedCount" :max="goodsinfo.stock_quantity"></numbox></p>
                    <p>
                        <mt-button type="primary" size="small">立即购买</mt-button>
                        <mt-button type="danger" size="small" @click="addToShopCar">加入购物车</mt-button>
                    </p>
                </div>
            </div>
        </div>

        <!-- 商品参数区域 -->
        <div class="mui-card">
            <div class="mui-card-header">商品参数</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p>商品货号：{{goodsinfo.goods_no}}</p>
                    <p>库存情况：{{goodsinfo.stock_quantity}} 件</p>
                    <p>上架时间：{{goodsinfo.add_time| dateFormat}}</p>
                </div>
            </div>
            <div class="mui-card-footer">
                <mt-button type="primary" size="large" plain @click="goDesc(id)">图文介绍</mt-button>
                <br>
                <mt-button type="danger" size="large" plain @click="goComment(id)">商品评价</mt-button>
            </div>
        </div>
    </div>
</template>

<script>
    import swiper from '../subcomponents/swiper.vue'
    import numbox from '../subcomponents/goodsinfo-numbox.vue'
    export default {
        name: "GoodsInfo",
        data() {
            return {
                id:this.$route.params.id,  //将路由参数对象中的id挂载到data
                title:"",
                lunbotu:[],
                goodsinfo:{},
                ballFlag:false,
                selectedCount:1
            };
        },
        created(){
            this.getLunbotu(),
            this.getGoodsInfo()
        },
        methods:{
            getLunbotu(){
                this.$http.get('java/goods/getlunbotuimages.json').then(result =>{
                    if(result.body.status === 0){
                        //先循环轮播图数组的每一项，为 item 添加 img 属性，因为轮播图数组组件中，只认识item.img ，不认识 item.src
                        result.body.message.forEach(item=>{
                            item.img = item.src  //很重要
                        })
                        this.lunbotu = result.body.message
                    }
                })
            },
            getGoodsInfo(){
                this.$http.get('java/goods/getinfo' + this.id +".json").then(result =>{
                    if(result.body.status === 0)
                    {
                        this.goodsinfo = result.body.message[0]
                    }
                })
            },
            goDesc(id){
                this.$router.push({name:"goodsdesc",params:{ id }})
            },
            goComment(id){
                this.$router.push({name:"goodscomment",params:{ id }})
            },
            addToShopCar(){
                this.ballFlag = !this.ballFlag;
                var goodsinfo = {id:this.id, title:this.goodsinfo.title,count:this.selectedCount, price:this.goodsinfo.sell_price, selected:true }
                this.$store.commit("addToCar",goodsinfo)
            },
            beforeEnter(el){
                el.style.transform="translate(0,0)"
            },
            enter(el,done){

                el.offsetWidth;
               const BallPosition = this.$refs.ball.getBoundingClientRect();
               const BadgePosition = document.getElementById('badge').getBoundingClientRect();

               const xDist = -BallPosition.left + BadgePosition.left;
               const yDist = -BallPosition.top + BadgePosition.top;


                el.style.transform = `translate(${xDist}px,${yDist}px)`;
                el.style.transition = "all 1s ease";
                done()
            },
            afterEnter(el){
                this.ballFlag = !this.ballFlag
            },
            getSelectedCount(count){
                //当子组件把选中的数量传递给父组件的时候，把选中的商品数量保存到 data 上
                this.selectedCount = count;
                console.log('父组件拿到的值：' + this.selectedCount )
            }
        },
        components:{
            swiper,
            numbox
        }
    }
</script>

<style scoped lang="scss">
.goodsinfo-container{
    background-color: #eee;
    .mui-card-footer{
        display: block;
    };
.ball{
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background-color: red;
    position: absolute;
    z-index: 99;
    top: 390px;
    left: 146px;

}
}
</style>